Syndesmosis Treatment Construct

ABSTRACT

An apparatus and method are provided for a syndesmosis treatment construct configured to be placed into a cinched configuration that presses a first bone against a second bone. The syndesmosis treatment construct comprises a proximal fixator to contact the first bone and a distal fixator to contact the second bone. A first suture and a second suture are parallelly looped through the proximal fixator and oppositely looped through the distal fixator. Distal ends of the first and second sutures are fixated within a washer disposed between the proximal fixator and the first bone. Proximal ends of the first and second sutures are passed through openings in the washer and through the proximal fixator. Pulling of the proximal ends by a practitioner places the syndesmosis treatment construct into a cinched configuration. Any of various suitable suture knots may be formed so as to fixate the cinched configuration.

PRIORITY

This application claims the benefit of and priority to U.S. ProvisionalApplication, entitled “Syndesmosis Treatment Construct,” filed on Jul.17, 2018 and having application Ser. No. 62/699,617, the entirety ofsaid application being incorporated herein by reference.

FIELD

Embodiments of the present disclosure generally relate to the field ofsecuring bones together. More specifically, embodiments of thedisclosure relate to systems and methods for a syndesmosis treatmentconstruct configured to be placed into a cinched configuration thatsecures a first bone against a second bone.

BACKGROUND

A syndesmosis is a slightly movable fibrous joint in which bones such asthe tibia and fibula are joined together by connective tissue. Thedistal tibia fibular joint and the radioulnar joint are examples ofsyndesmoses. Injuries to the ankle syndesmosis are common and frequentlyoccur in patients having ankle fractures.

Due to the complex biomechanics of ankle syndesmosis injuries and therelatively increased healing time associated with them, there has beenwidespread debate on both the strongest and most appropriate methods offixation when treated operatively. Conventional treatments for anklesyndesmosis injuries include metallic or bioabsorbable screw fixation,as well as various methods of suture button fixation. A benefit ofsuture button fixation treatments is that they generally do not requireadditional procedures for removal of implants as do screw fixationtreatments.

There is an ongoing need for the development of bone fusion capabilitiessuch as that related to, for example, treating injuries to the anklesyndesmosis. Provided herein are embodiments and methods for asyndesmosis treatment construct configured to be placed into a cinchedconfiguration that presses a first bone against a second bone.

SUMMARY

An apparatus and method are provided for a syndesmosis treatmentconstruct configured to be passed through a bone hole across a firstbone and a second bone and placed into a cinched configuration wherebythe first bone and the second bone are pressed together. The syndesmosistreatment construct comprises a proximal fixator configured to contactthe first bone and a distal fixator configured to contact the secondbone. A first suture and a second suture are parallelly looped throughthe proximal fixator and oppositely looped through the distal fixatorsuch that a proximal end of the first suture and a proximal end of thesecond suture extend from the proximal fixator. A washer is disposedbetween the first bone and the proximal fixator and is configured tofixate a distal end of the first suture and a distal end of the secondsuture, such that pulling on the proximal end of the first suture andthe proximal end of the second suture places the syndesmosis treatmentconstruct into the cinched configuration.

In an exemplary embodiment, a syndesmosis treatment construct configuredto be passed through a bone hole across a first bone and a second boneand placed into a cinched configuration whereby the first bone and thesecond bone are pressed together comprises: a proximal fixatorconfigured to contact the first bone; a distal fixator configured tocontact the second bone; a first suture and a second suture parallellylooped through the proximal fixator and oppositely looped through thedistal fixator such that a proximal end of the first suture and aproximal end of the second suture extend from the proximal fixator; anda washer disposed between the first bone and the proximal fixator andconfigured to fixate a distal end of the first suture and a distal endof the second suture, such that pulling on the proximal end of the firstsuture and the proximal end of the second suture causes the cinchedconfiguration.

In another exemplary embodiment, the proximal fixator and the washer areconfigured to be seated within an aperture of a bone fusion plate. Inanother exemplary embodiment, the proximal fixator is a cone-shapedmember configured to contact a disk portion comprising the washer, thedisk portion being configured to contact bone in lieu of being seatedwithin the aperture.

In another exemplary embodiment, the proximal fixator includes a firstaperture, a second aperture, a third aperture and a fourth aperture thatare configured to facilitate a practitioner forming various surgicalknots to maintain the cinched configuration. In another exemplaryembodiment, the proximal end of the first suture is drawn proximallythrough the first aperture and passed distally through the fourthaperture before exiting between the washer and the proximal fixator, andwherein the proximal end of the second suture is drawn proximallythrough the second aperture and passed through the third aperture beforeexiting between the washer and the proximal fixator, the exitingproximal end of the first suture and the exiting proximal end of thesecond suture being configured to facilitate a practitioner forming anyof various surgical knots to maintain the cinched configuration.

In another exemplary embodiment, the washer is a cone-shaped memberincluding a disk portion with a centrally disposed countersunk hole thatis configured to fixate the distal end of the first suture and thedistal end of the second suture. In another exemplary embodiment, thecountersunk hole is configured to receive a compressible sleeve that iscrimped onto the distal end of the first suture and the distal end ofthe second suture, such that the distal end of the first suture and thedistal end of the second suture are fixated with respect to the washer.In another exemplary embodiment, the disk portion includes a firstsuture passthrough and a second suture passthrough disposed on oppositesides of the washer and configured to allow the proximal end of thefirst suture and the proximal end of the second suture to extend throughthe washer. In another exemplary embodiment, the disk portion includesmultiple raised portions extending radially from the countersunk hole tothe periphery of the disk portion. In another exemplary embodiment, theraised portions are configured to a contact surface for the proximalfixator in the cinched configuration. In another exemplary embodiment,the raised portions are configured to provide a space between theproximal fixator and the washer through which the proximal end of thefirst suture and the proximal end of the second may be passed.

In another exemplary embodiment, the distal fixator comprises anoblong-shaped member having a first aperture and a second aperture andis configured to be drawn through the bone hole before the first boneand the second bone are cinched together. In another exemplaryembodiment, the first suture extends distally through the first apertureand extends proximally through the second aperture, and wherein thesecond suture extends distally through the second aperture and thenextends proximally through the first aperture. In another exemplaryembodiment, the first suture and the second suture loop oppositelythrough the first aperture and the second aperture to inhibit rotationof the distal fixator during cinching the syndesmosis treatmentconstruct.

In an exemplary embodiment, a method for syndesmosis treatment constructconfigured to be passed through a bone hole across a first bone and asecond bone and placed into a cinched configuration whereby the firstbone and the second bone are pressed together comprises: configuring aproximal fixator to contact the first bone; configuring a distal fixatorto contact the second bone; looping a first suture and a second sutureparallelly through the proximal fixator and oppositely through thedistal fixator, such that a proximal end of the first suture and aproximal end of the second suture extend from the proximal fixator;configuring a washer to fixate a distal end of the first suture and adistal end of the second suture; and disposing the washer between thefirst bone and the proximal fixator such that pulling on the proximalend of the first suture and the proximal end of the second suture causesthe cinched configuration.

In another exemplary embodiment, configuring the washer includes forminga disk portion of the washer to be seated either within an aperture of abone fusion plate or in contact with the first bone in absence of thebone fusion plate. In another exemplary embodiment, configuring theproximal fixator includes forming a first aperture, a second aperture, athird aperture and a fourth aperture to facilitate a practitionerforming various surgical knots to maintain the cinched configuration. Inanother exemplary embodiment, configuring the distal fixator includesforming an oblong-shaped member having a first aperture and a secondaperture that is suitable to be drawn through the bone hole before thefirst bone and the second bone are cinched together.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings refer to embodiments of the present disclosure in which:

FIG. 1 illustrates an exemplary use environment wherein an exemplaryembodiment of a syndesmosis treatment construct is disposed within abone hole and pressing a first bone and a second bone together, inaccordance with the present disclosure;

FIG. 2A illustrates a distal portion of the syndesmosis treatmentconstruct of FIG. 1, according to the present disclosure;

FIG. 2B illustrates a proximal portion of the syndesmosis treatmentconstruct of FIG. 1, in accordance with the present disclosure;

FIG. 3 illustrates a close-up isometric view of a distal fixator,according to the present disclosure;

FIG. 4 illustrates a cross-sectional view of a proximal fixator engagedwith a washer according to the present disclosure;

FIG. 5 illustrates the proximal fixator and washer of FIG. 4 seated withan aperture of a bone fusion plate, according to the present disclosure;

FIG. 6 illustrates a close-up isometric view of a washer, according tothe present disclosure;

FIG. 7 illustrates a close-up isometric view of a proximal fixator inaccordance with the present disclosure; and

FIG. 8 illustrates an exemplary routing of a first suture and a secondsuture through the apertures of a proximal fixator.

While the present disclosure is subject to various modifications andalternative forms, specific embodiments thereof have been shown by wayof example in the drawings and will herein be described in detail. Theinvention should be understood to not be limited to the particular formsdisclosed, but on the contrary, the intention is to cover allmodifications, equivalents, and alternatives falling within the spiritand scope of the present disclosure.

DETAILED DESCRIPTION

In the following description, numerous specific details are set forth inorder to provide a thorough understanding of the present disclosure. Itwill be apparent, however, to one of ordinary skill in the art that theinvention disclosed herein may be practiced without these specificdetails. In other instances, specific numeric references such as “firstsuture,” may be made. However, the specific numeric reference should notbe interpreted as a literal sequential order but rather interpreted thatthe “first suture” is different than a “second suture.” Thus, thespecific details set forth are merely exemplary. The specific detailsmay be varied from and still be contemplated to be within the spirit andscope of the present disclosure. The term “coupled” is defined asmeaning connected either directly to the component or indirectly to thecomponent through another component. Further, as used herein, the terms“about,” “approximately,” or “substantially” for any numerical values orranges indicate a suitable dimensional tolerance that allows the part orcollection of components to function for its intended purpose asdescribed herein.

A syndesmosis is a slightly movable fibrous joint in which bones such asthe tibia and fibula are joined together by connective tissue. Thedistal tibia fibular joint and the radioulnar joint are examples ofsyndesmoses. Injuries to the ankle syndesmosis are common and frequentlyoccur in patients having ankle fractures. There is an ongoing need forthe development of bone fusion capabilities such as that found in, forexample, treating injuries to the ankle syndesmosis. Provided herein areembodiments and methods for a syndesmosis treatment construct configuredto be placed into a cinched configuration that presses a first boneagainst a second bone.

FIG. 1 illustrates an exemplary use environment wherein an exemplaryembodiment of a syndesmosis treatment construct 180 is disposed within abone hole 184 and pressing a first bone 188 and a second bone 192together, in accordance with the present disclosure. The syndesmosistreatment construct 180 comprises a proximal fixator 196 and a washer200 that are configured to contact the first bone 184, and a distalfixator 204 that is configured to contact the second bone 192. In theembodiment illustrated in FIG. 1, the proximal fixator 196 and thewasher 200 are seated within an aperture 208 of a bone fusion plate 212.Although the bone fusion plate 212 desirably provides support for theproximal fixator 196 and the washer 200, the bone fusion plate 212 maybe omitted without limitation and the proximal fixator 196 and thewasher 200 may contact the first bone 188, as desired. Further, itshould be understood that the washer 200 is an optional component thatmay be omitted, in some embodiments, and the proximal fixator 196 may beplaced directly in contact with the first bone 188 or the bone fusionplate 212, as needed.

The proximal fixator 196 is generally a round, cone-shaped membersuitable for contacting bone, and the distal fixator 204 is anoblong-shaped member suitable for contacting bone. As will beappreciated, the oblong-shape of the distal fixator 204 is configured tobe drawn through the bone hole 184 before the first and second bones188, 192 are cinched together. In general, however, the proximal anddistal fixators 196, 204 may include any of various shapes that arefound to be advantageous for pressing bones together, withoutlimitation.

FIGS. 2A and 2B illustrate closer views of the distal fixator 204 andthe proximal fixator 196, respectively. As shown in FIGS. 2A-2B, thesyndesmosis treatment construct 180 includes a first suture 216 and asecond suture 220 that are parallelly looped through the proximalfixator 196, the washer 200 and the distal fixator 204 such that aproximal end 224 of the first suture 216 and a proximal end 228 of thesecond suture 220 extend from the proximal fixator 196. The proximalends 224, 228 extending from the proximal fixator 196 enable the surgeonto pull on the first and second sutures 216, 220 to place thesyndesmosis treatment construct 180 into the cinched configuration shownin FIG. 1. As will be appreciated, the first and second sutures 216, 220are generally comprised of any of various suture materials that aresuitable for syndesmosis treatment.

With continuing reference to FIG. 2A, although the first and secondsutures 216, 220 are parallelly looped through the proximal and distalfixators 196, 204, as disclosed hereinabove, the first and secondsutures 216, 220 are looped in opposite directions. As such, the firstsuture 216 extends distally through a first aperture 232 comprising thedistal fixator 204. The first suture 216 loops around a bar 236, shownin FIG. 3, and extends proximally through a second aperture 240 of thedistal fixator 204. The second suture 220 extends distally through thesecond aperture 240, loops around the bar 236 and then extendsproximally through the first aperture 232. It is contemplated thatlooping the first and second sutures 216, 220 in opposite directionsserves to inhibit an undesirable rotation of the distal fixator 204 uponcinching the syndesmosis treatment construct 180, as shown in FIG. 1.

Turning now to FIG. 2B, in general the proximal fixator 196 and thewasher 200 cooperate with the distal fixator 204 to cinch thesyndesmosis treatment construct 180 when the surgeon pulls on theproximal ends 224, 228. The proximal ends 224, 228 pass throughapertures disposed in the proximal fixator 196 and the washer 200 whilerespective distal ends 244, 248 are fixated in the washer 200. In anembodiment shown in FIG. 4, the distal ends 244, 248 are fixated withina compressible sleeve 252 that is disposed within a countersunk hole 256of the washer 200. Thus, with the distal ends 244, 248 effectivelyfixated in the washer 200, pulling on the proximal ends 224, 228 cinchesthe first and second sutures 216, 220 around the distal fixator 204,causing the washer 200 to be pulled into and seated within the aperture208 of the bone fusion plate 212, as shown in FIG. 5. It is contemplatedthat once the syndesmosis treatment construct 180 is placed in thecinched configuration as shown in FIG. 5, the surgeon may form any ofvarious suitable suture knots so as to fixate the cinched configuration.

FIG. 6 illustrates a close-up isometric view of the washer 200,according to the present disclosure. The washer 200 generally is acone-shaped member that includes a disk portion 260 with a centrallydisposed countersunk hole 256. As discussed above, the countersunk hole256 is configured to fixate the distal ends 244, 248. In someembodiments, the countersunk hole 256 is configured to receive acompressible sleeve, such as the sleeve 252, that is crimped onto thedistal ends 244, 248, such that the distal ends are fixated with respectto the washer 200.

In the illustrated embodiment of FIG. 6, the disk portion 260 includes afirst suture passthrough 264 and a second suture passthrough 268disposed on opposite sides of the washer 200. The first and secondsuture passthroughs 264, 268 respectively allow the proximal ends 224,228 to extend from the bone hole 184, through the washer 200 and to theproximal fixator 196. Further, multiple raised portions 272 are disposedin the disk portion 260, extending radially from the countersunk hole256 to the periphery of the disk portion 260. In some embodiments, theraised portions 272 provide structural integrity and a contact surfacefor the proximal fixator 196 when the syndesmosis treatment construct180 is in the cinched configuration. In some embodiments, the raisedportions 272 provide a space between the proximal fixator 196 and thewasher 200 through which the sutures 216, 220 may passed during formingsurgical knots. It is contemplated that the raised portions 272advantageously prevent the sutures from being damaged due to beingpinched between the proximal fixator 196 and the washer 200.

FIG. 7 illustrates a close-up isometric view of the proximal fixator 196in accordance with the present disclosure. The proximal fixator 196generally is a cone-shaped member configured to contact the washer 200as shown in FIG. 5. In the illustrated embodiment of FIG. 7, theproximal fixator 196 includes a first aperture 276, a second aperture280, a third aperture 284 and a fourth aperture 288. The first andsecond apertures 276, 280 are disposed on opposite sides of the proximalfixator 196, and the third and fourth apertures 284, 288 are alsooppositely disposed on the proximal fixator. As will be appreciated, theapertures 276-288 are configured to facilitate the surgeon formingvarious surgical knots so as to maintain the cinched configuration ofthe syndesmosis treatment construction 180.

An exemplary routing of the first and second sutures 216, 220 throughthe apertures 276-288 is illustrated in FIG. 8. The first suture 216,upon exiting the first suture passthrough 264 of the washer 200, isdrawn proximally through the first aperture 276. Similarly, the secondsuture 220 exits the second suture passthrough 268 of the washer 200 andis drawn proximally through the second aperture 280. The sutures 216,220 may be next drawn distally through adjacent apertures before beingpassed between the proximal fixator 196 and the disk portion 260 of thewasher 200. In the embodiment illustrated in FIG. 8, the first suture216 extends from the first aperture 276 and is drawn distally throughthe fourth aperture 288 while the second suture 220 extends from thesecond aperture 280 and is drawn distally through the third aperture284. It should be understood that the order in which the first andsecond sutures 216, 220 are drawn through the apertures 276-288 ispresented herein merely for the sake exposition and is not be construedas limiting in any way. It is contemplated, therefore, that the sutures216, 220 may be threaded through the proximal fixator 196 by way of anyof various suitable routes that may be found to be beneficial inpractice. It is further contemplated that after drawing the first andsecond sutures 216, 220 through the proximal fixator 196, the surgeonmay perform any of various surgical knots to lock the syndesmosistreatment construct 180 in the cinched configuration, as discussedhereinabove.

While the invention has been described in terms of particular variationsand illustrative figures, those of ordinary skill in the art willrecognize that the invention is not limited to the variations or figuresdescribed. In addition, where methods and steps described above indicatecertain events occurring in certain order, those of ordinary skill inthe art will recognize that the ordering of certain steps may bemodified and that such modifications are in accordance with thevariations of the invention. Additionally, certain of the steps may beperformed concurrently in a parallel process when possible, as well asperformed sequentially as described above. To the extent there arevariations of the invention, which are within the spirit of thedisclosure or equivalent to the inventions found in the claims, it isthe intent that this patent will cover those variations as well.Therefore, the present disclosure is to be understood as not limited bythe specific embodiments described herein, but only by scope of theappended claims.

What is claimed is:
 1. A syndesmosis treatment construct configured tobe passed through a bone hole across a first bone and a second bone andplaced into a cinched configuration whereby the first bone and thesecond bone are pressed together, the syndesmosis treatment constructcomprising: a proximal fixator configured to contact the first bone; adistal fixator configured to contact the second bone; a first suture anda second suture parallelly looped through the proximal fixator andoppositely looped through the distal fixator such that a proximal end ofthe first suture and a proximal end of the second suture extend from theproximal fixator; and a washer disposed between the first bone and theproximal fixator and configured to fixate a distal end of the firstsuture and a distal end of the second suture, such that pulling on theproximal end of the first suture and the proximal end of the secondsuture causes the cinched configuration.
 2. The syndesmosis treatmentconstruct of claim 1, wherein the proximal fixator and the washer areconfigured to be seated within an aperture of a bone fusion plate. 3.The syndesmosis treatment construct of claim 2, wherein the proximalfixator is a cone-shaped member configured to contact a disk portioncomprising the washer, the disk portion being configured to contact bonein lieu of being seated within the aperture.
 4. The syndesmosistreatment construct of claim 1, wherein the proximal fixator includes afirst aperture, a second aperture, a third aperture and a fourthaperture that are configured to facilitate a practitioner formingvarious surgical knots to maintain the cinched configuration.
 5. Thesyndesmosis treatment construct of claim 4, wherein the proximal end ofthe first suture is drawn proximally through the first aperture andpassed distally through the fourth aperture before exiting between thewasher and the proximal fixator, and wherein the proximal end of thesecond suture is drawn proximally through the second aperture and passedthrough the third aperture before exiting between the washer and theproximal fixator, the exiting proximal end of the first suture and theexiting proximal end of the second suture being configured to facilitatea practitioner forming any of various surgical knots to maintain thecinched configuration.
 6. The syndesmosis treatment construct of claim1, wherein the washer is a cone-shaped member including a disk portionwith a centrally disposed countersunk hole that is configured to fixatethe distal end of the first suture and the distal end of the secondsuture.
 7. The syndesmosis treatment construct of claim 6, wherein thecountersunk hole is configured to receive a compressible sleeve that iscrimped onto the distal end of the first suture and the distal end ofthe second suture, such that the distal end of the first suture and thedistal end of the second suture are fixated with respect to the washer.8. The syndesmosis treatment construct of claim 6, wherein the diskportion includes a first suture passthrough and a second suturepassthrough disposed on opposite sides of the washer and configured toallow the proximal end of the first suture and the proximal end of thesecond suture to extend through the washer.
 9. The syndesmosis treatmentconstruct of claim 6, wherein the disk portion includes multiple raisedportions extending radially from the countersunk hole to the peripheryof the disk portion.
 10. The syndesmosis treatment construct of claim 9,wherein the raised portions are configured to a contact surface for theproximal fixator in the cinched configuration.
 11. The syndesmosistreatment construct of claim 10, wherein the raised portions areconfigured to provide a space between the proximal fixator and thewasher through which the proximal end of the first suture and theproximal end of the second may be passed.
 12. The syndesmosis treatmentconstruct of claim 1, wherein the distal fixator comprises anoblong-shaped member having a first aperture and a second aperture andis configured to be drawn through the bone hole before the first boneand the second bone are cinched together.
 13. The syndesmosis treatmentconstruct of claim 12, wherein the first suture extends distally throughthe first aperture and extends proximally through the second aperture,and wherein the second suture extends distally through the secondaperture and then extends proximally through the first aperture.
 14. Thesyndesmosis treatment construct of claim 13, wherein the first sutureand the second suture loop oppositely through the first aperture and thesecond aperture to inhibit rotation of the distal fixator duringcinching the syndesmosis treatment construct.
 15. A method forsyndesmosis treatment construct configured to be passed through a bonehole across a first bone and a second bone and placed into a cinchedconfiguration whereby the first bone and the second bone are pressedtogether, the method comprising: configuring a proximal fixator tocontact the first bone; configuring a distal fixator to contact thesecond bone; looping a first suture and a second suture parallellythrough the proximal fixator and oppositely through the distal fixator,such that a proximal end of the first suture and a proximal end of thesecond suture extend from the proximal fixator; configuring a washer tofixate a distal end of the first suture and a distal end of the secondsuture; and disposing the washer between the first bone and the proximalfixator such that pulling on the proximal end of the first suture andthe proximal end of the second suture causes the cinched configuration.16. The method of claim 15, wherein configuring the washer includesforming a disk portion of the washer to be seated either within anaperture of a bone fusion plate or in contact with the first bone inabsence of the bone fusion plate.
 17. The method of claim 15, whereinconfiguring the proximal fixator includes forming a first aperture, asecond aperture, a third aperture and a fourth aperture to facilitate apractitioner forming various surgical knots to maintain the cinchedconfiguration.
 18. The method of claim 15, wherein configuring thedistal fixator includes forming an oblong-shaped member having a firstaperture and a second aperture that is suitable to be drawn through thebone hole before the first bone and the second bone are cinchedtogether.